Simple polylines & polygons don't appear if initialized with map

[friedbunny]

Polylines and polygons that don't require much processing before being added to the map fail to ever appear, if initialized concurrently with the map. Adding the slightest delay or drawing the shapes in viewDidAppear causes them to appear as expected.

The GeoJSON example works when drawn directly in viewDidLoad.
#2289 fixed this problem for markers and complex shapes, but I clearly must have missed the simple case during testing.

Demo (based on this):

import Mapbox

class ViewController: UIViewController, MGLMapViewDelegate {

    var mapView: MGLMapView!

    override func viewDidLoad() {
        super.viewDidLoad()

        mapView = MGLMapView(frame: view.bounds)
        mapView.autoresizingMask = .FlexibleWidth | .FlexibleHeight

        mapView.setCenterCoordinate(CLLocationCoordinate2D(latitude: 45.520486,
                                                           longitude: -122.673541),
                                    zoomLevel: 11, animated: false)
        view.addSubview(mapView)

        mapView.delegate = self

        // this works
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0), dispatch_get_main_queue(), {
            self.drawShape()
        })

        // this does not work
        drawShape()
    }

    override func viewDidAppear(animated: Bool) {
        // this works
        drawShape()
    }

    func drawShape() {
        // Create a coordinates array to hold all of the coordinates for our shape.
        var coordinates = [
            CLLocationCoordinate2D(latitude: 45.522585, longitude: -122.685699),
            CLLocationCoordinate2D(latitude: 45.534611, longitude: -122.708873),
            CLLocationCoordinate2D(latitude: 45.530883, longitude: -122.678833),
            CLLocationCoordinate2D(latitude: 45.547115, longitude: -122.667503),
            CLLocationCoordinate2D(latitude: 45.530643, longitude: -122.660121),
            CLLocationCoordinate2D(latitude: 45.533529, longitude: -122.636260),
            CLLocationCoordinate2D(latitude: 45.521743, longitude: -122.659091),
            CLLocationCoordinate2D(latitude: 45.510677, longitude: -122.648792),
            CLLocationCoordinate2D(latitude: 45.515008, longitude: -122.664070),
            CLLocationCoordinate2D(latitude: 45.502496, longitude: -122.669048),
            CLLocationCoordinate2D(latitude: 45.515369, longitude: -122.678489),
            CLLocationCoordinate2D(latitude: 45.506346, longitude: -122.702007),
            CLLocationCoordinate2D(latitude: 45.522585, longitude: -122.685699),
        ]

        let shape = MGLPolygon(coordinates: &coordinates, count: UInt(coordinates.count))

        mapView.addAnnotation(shape)
    }
}

/cc @incanus

[incanus]

Hmm, this shouldn't be related to #1675 / #2289 as shapes aren't dependent upon the sprite or sprite store initialization the way marker images are.

[friedbunny]

shapes aren't dependent upon the sprite or sprite store initialization the way marker images are.

Totally. Something definitely improved the timing issue that did exist, in any case, as dispatch_after zero seconds didn't previously work.